Pneumatic clutch.



J. C. GARRETT. PNEUMATIG CLUTCH.

APPLICATION FILED AUG. 25, 1904.

927,229. Patented Juy 6,1909. v

.IAB/IES C. GARREI'T, OF SAN FRANCISCO, CALIFORNIA.

PNEUMATIG CLUTCH.

nacemos.

To all 'wko/m. it may concern: i

Be it known that I, JAMES C. GARRJETT, a

` citizen of the United States, and resident of i 4San Francisco, in thecounty of San Francisco and State of California, have invented certain flnew and'useful Improvements in Pneumatic This invention is for thesamev subject mat ter -asfmy application, Serial No. 129,113, .filedOctober, 28, 41902 for pneumatic clutches.

= Myinvention relates to clutches, and has for its object to provide anew and novel device orminimi'zing the impact transmitted Clutches, ofwhichthefollowing is a speci- VWhenconnecting a rotating member `to amember at rest, 'andto automatically control and direct the connectionof the drivingand 'driven members, in such' manner, that the contactingjaws on the face of each clutching member `will full-y'overlap eachother when i the. contact.-

rnernberto a member at rest when motion is T Lhe-.enovelty .of myyinvention consists vin 4the usefoflmprisonedair to cushion and retard`the lmpact transmitted by a moving applied to.` saidmember at rest.

,.iAl-funther object is to provide means for( regulating thetransposition of the cushioning and 'retardmgmedlum .from the pressed'to ivaeuumsides; othe aircompartments in the cylindemfwd 'for returningthe .compressor-to its -set or operative position after. 4the clutchVmembers have been dis:- iconnected. 'f l" The device is adaptedto beIused on same Vorne arate shafts and may be employed to slllpplyal'lvthc requirements of an ordinary cutcn f-i,

:l Itis intended to provide a clutch, simple in its construction `and'combining the advantages of' 'the positive with fthe `yielding thebrackets Bi fas shown in Fi "These Other objects and advantagesiol Etheinven- 'tion will-appear'in the courcfofthe s ubjoined g qualitiesofith'e "lfriction* type of clutches.

description.

y 'l' llnlthecostruction here shown the driving nflthebracketiBfIg-,211is a'verticalcross direct andisdriven `nrcnibers are jconnectedautol niaticallygbut they mai begconne'cted bythe lication nfl t eactuatingY lever to thefaxiy movable sleeve.

ig-.iIn theaccompariying drawings-Figure 1 is I affhorizontalsection of'my device on line X X, onFig. 2,?witli the arm C- broken away onflineYY; show' glthe shape and fastening l specification of Letters Patent..Application filed August`25, 1904. Sera! o. "`22,190.

. ameter' Patinwnnny e, 1909,

section of the line X1 through Fig. l, looking from the right and theconnecting rods N rcmoved. Fig?" a iront elevation ofthe disk and itsinwardly extending `arms shownlO lin dotted lines and des1gnated"as""compressor.

Fig. 4 is a vertical 'cross section Ti on the line V'V on Fig. l lookingfrom the left. Fig. 5 is a portion .of the external surface of thecylinder :1t the end connected to the driving member.

Similar' letters designate corresponding parts in the various views ofthe Vdrawing.

For convenience'in describind my invention, `I shall designate thecircular device A keyed to the shaft O, the ey1inderor Fimpollingmember. pieces secured to the concave surface'of the .cylinder andlettered B, shall `beeallcd the brackets The device operatinginside of,and forming an inclosing end forthecylindc'r The centrally projecting*551 is called the "compressor and lettered.

And the device pivoted to the sleeve E on the driven member andextending over the cylinder shall be designated as the connecting rodsand lettered N vand N In the construction shown in Fig. 1 of thedrawings, the cylinder A is made with one end open, the opposite end- A1and the hub Ai' is constructed in one piece. The barrel of the cylinderis projected to a determined distance beyond lthe end A1 as shown at A,and

provided with inclines A shown in Figs. l and 5 for a purpose whichshall be hereinafter described. The cylinder A is secured tothe drivingmember O, by the key OshbWn in Fig. 1 but the end of the cylinder andshaft may be made in one piece and provided with a flange adapted to bejoined to a 'correspond-- ing'flange on xthe driving member. f Grooves Aare cut longitudinally in the concaved'suring abutments `for `theprojecting ribs Bt, on

brackets are constructed with =t ir plane or tcontactin able bearing forthe'contacting surfaces C the arms C* 'G1 ofthe compressor and theirconvex surfaces neatly iitting to thec'oncave face of the cylinder forthe urpose of providy surfaces Bf in 'line Withthe fthe cylinder Atoprovide a' fault surface ofthe oylinderA andprovided'witih ribs`Bttitting neatly'into'th'e" roovesiAito brace againstthe impact exerbylthe mov ing'membe'r. O, when the clutch shulderBE 'of the drivenmember are moved into-conne@- -tion with the clutchshoulders Ga on-th'eldisl:

of( the compressor; the baseB'fi breek t which E passing through thoMise of 'the brani E and. the barrel of ille @yiiiider A, as shown inFig. 2. disk.

The inerposed coniiicioii riwftween ivi (1i iiggiin' Lied;

'ie '.rj/ of the dik driving :1mi drivan mmiduers :md designa ed or mi@:is the compressor siifrwvzi in Figs. i, 2 and 3 angie dge Uf consist-:5ofamiirm ion compoedofadisi, surface 0f the iiitch shoulders and aircompmssing firms iiiting no the extending 'roiii mi emigrare-1l, veniriii oppoprvided and. sire direzwns md having' th@ Simp@ shown Fig. i iin sctiomi Vim Fiq. 2. i spring @i /iis d l Fig. i3 darm/.Q tim face ofiii@ dis with ith@ im Si 'in ih; J cm" oi 'the cinici; z-siioiii'iririsC, mi it@ surn insulin-irs :ira fric-er1.: icompressor:1i-msi?iridnix'fdinfgs, a, 'vi il i the p1 proii-ciim of i ii s;,sho;vrziii Fiy i. @nire0g3gm 1i de of this dikz ciz'ciiiargroovn prissvd tu the C4 is cut,siwwii in. cinfted iines ir; i und untii the arms in SQ 'ieu'mi ViewFil: vI of n. i'iiriension to ad ing sur'le B1 mit tim 'ii-:Sertimi :mdoperatii'm of th@ edge AG of 'n R cyii iur Tho, firms C Cl are cimsirm:,ed in y "t and operate ir. the rwjfi-- r *51mm iiider .L'.. fi.iiariijs (15 imrcd h-firizmiiniy' fram tim. center of tim disk having aicomi in ihr.

simi; enirirgmiiir iii the .izicc lui" the disk, dra 'l reim andthgfurzzi @i U14 a :i vLili-vided wie is sunk n corisi/ into the HMH ff,.did i mp iioi; Gi im priv/idei'i, having i iii head and it?, oppositemid siigitziiiiy iireridex l v"Through @finir um si the ?niri3 )ress.frC if i v .riicai haie C7 C? siwwn, in dotted iiiios in in doiimi iiiiiesFig. 2,l is inbred idr iii@ purp'usiii of permitting ein i tire psisrigof nir imm on@ sid@ 0i' the mms and di ti @i (l im Hifi n'flim, andiriim the zic mi iie i e disk] Eiga 3 :u l, two hoieisil fcnrreiipm'iding drimnar :it muda izoriziintaiij* s@ mi; to l j intersect iii@ veriz. horizontal hairs ma provided. 'with t :md :1ro umm ersiiidi for diepurpse'o pfrtim si mitting' tim houd ai Lim inrit C to si bf pin youdthe surfsw of the disk. i'oiLs {19T-Hrm Tha pins rentar provided forinseriion in these .finies having the fwxiiiiiry suitable threzidg imtimir shrinks ind their houd provided with grovcs iur purpose nf turningthe mmr, by the, opumizioii of which Mia pzifiszige of air i'rim'i om:si( e (if the, arms C1 il* t; iii@ nher may ile rug-:dated erprei/'ennui mi: dii-wiriad in, the operaiiun oi' iii@ clutch.` Wiwn timamm-firms@ ixizirr'nd into iii?, cyindm', they, @dw A" anim-ing @iiggroove, in the disk, ther boit is imm-wd im imi@ 'These imi, is pivrnjdmadfs liever i m tiri?,

ipp: is.; d. wnsiri'aceii. in the form u i A .i im indi, iimid um @haser-imrwi:

(me and of the s'n'infa is abut-v i end is similarly :ibm/ted i zigains;the pin D* nearthe periphery of the A depressifm. D4 is cui.' on thi-'periphof the aumpressor and a band r E. having mi ii'iwardijy' turnedright adapted tf) fi?, Closely 130 tim cylinder :md its: @thor pdg@deprfessicm D4 on the disk, is Secura! Hiervon :is shown in or thepurpose ni prnwcting the isi;y .By'ti'iig provision it will if .i'iwniii@ driving and driven cnnnwvd. the spring D wiii .0:

Mid tim air Y :ii mmnbers .fire disc'fmriacifd thv spring .U wiii i'nrcvthe cnmi'iressor back to ,its set m' yifm gire-.prired for the nextcimin 4') im its fric-0; dammi La irormesii with. (corresponding mam1ers if im, the disk (if time @Ompi-rasoi' sonnen drivii'ig mimbfar.

New tim opposite i? mounted cm. mow ioiigfudiim) iii', i is: con l vaiin spidm' C, and is 'pmv'idod with showin by (soi/ted iii s in Fig. 1.this grammi Fi" md Wiii, wlifin lever is spam iA more. the :lingcontact'. with @n Mii @ud 0i' the j raids.

.v piiwfed. in piisitii'm. THe

ii. is pivoted to any conve g5. l am limited m i iimgi mi im; agains imi driven to ifm drivii'ig msimiimi. g rods is vxtrndud ide ring E imving.Y

of said rods, the free' end of the spring N pressin against the bottomofthe groove E4 1n the s ceve E. This ring will, by reason `ol' thecentrally locate pivot E5 'cause the opposite end' ofthe rod to pressagainst the outside surface of the `cylinderE, when the restraining ringF2 ofthe spider is moved out of contact therewith and be raisedv and re`tained out of Contact with said cylinder when the spider F is moved tolthe opposite position shown in Fig. 1.

, The actuating lever K is pivoted to any convenient support at K1 andis constructed in the form of a circular band surrounding sleeve E. Intothe top'and bottom of this band'two inwardly projecting pins K2 K3 shownin dotted lines are inserted `at deter mined distances apart and of alength 4that will contact with and move the sleeve E axially, s o thatassuming the spider to be i moved out ofcontact with the ends of thcconnecting rods,on moving the actuating,r ie* ver K the pin K2 willcontact with the ring E3 on the end of the sleeve, moving it in thedirection of the driving member. The right Y l` angle end ofv the hookNi" will be forced into the incisure or cut away portion A in theprojecting end A* of the cylinder by the pressure 4of the springs N, andthe molines A3 will `draw the slceveon the driven member axially withits `clutch members E-into op* erative' connection `with the clutchmembers Cavof the com ressor connected with the driv- 'ingmember andwhen theinclines A3 contact with the'hooks N it is obvious that suffi-'40 cient distance has been provided between the A,pins K and- K topermit the automatici movement of tbeujini; E on the s1ce`re`E without'contacting with the pin K on the n actuating1 levenK. The connecting`rods will.

inthen ;oceu y the position shown by the broken ro Nlin Fig. 1 andmaintain such position until the rods N and N are acted upon by thespider F. By this construction it will bie seen that by reason oftheposition .i591 of the 'incline A3 on the projecting edge of thebarrel of' the cylinder the ,connecting movement is timed, and movedinto complete op erativeconnectio'njb the action of the ineline Aftonthe'lhoo N? .thus causing the members to rotate in' unison and on thecon nection being effected` the hooks N, on the connecting rods willoccu y a osition contactingr with the extende portion A4 of the end ofthe cylinderz and retain the clutch @remembers in operative connectionuntil the auxiliary lever H is operated to move the ring ofv the spiderinto contact with the ends N of the connecting rods and raise them outof contact with the endofmthe cylinder when the clutch members may bedisconnected.

`iuloie shaft, a cyliin Ib-ther Having new, it is belier/eeh fuilydescribed my invention, what if claim and desire to se cure LettersPatent for. l

y 1. 'In a pneumatic clutch, the combination of'a rotating shaft, tintedand revoluble members mounted thereon and forming an imprisoninginclosure for the cushioning me diuin, a driven member, ineens acting tocontact said iixed and rcvolublc members and thereby rotate the drivenmember, and .means to permit 'the cushioning .mediuni'to passalternately from one portion to the other of the said air i'ap minginclosure.

2. In a @hitch the ct bination of a revoluble. shaft, a cylinder orimpclling' member fast thcreoina bracket Within said cylinder,

a compressor adapted to be rotated within said cylinder, and providedwith an arm adapted to contactwitlii the bracket, said arm intvinganaperture erein to permit the cushioning medium wir. 1in the eylilnler topass alternately from one side of the corn presser to the other, driveneinher, and means'for connecting and disent nesting' the driven memberand the bonipresscr.

In a clutch the combination oi.E a revoor impelling member fast thereon,two oppositely arranged brach# ets 'within said cylinder, a compressoradapte ed to be rotated within said cylinifler and provided with armeadapted to contact with said braclcts` eacl's, arm having an ayjiertu retherein to permit the air to paas alternately from.v one side totheother oi the ari is, a driven monrber, andfmeans Afor connectingg` land.disoon necting the driven meml'ier and the com presser; y y

4. A power--transinittingA device com rising a plurality of rotatablesections co ectively forming a contractible air chamber, and meanscarried by one section. to limit the independent rotation of the othersection to iorrn a cushion of contract the' ci'iainber and compressedair therein.

5. A powerltransmitting ing a `piurality oif rotatabi ively 'orini u andmeans i theindcpenden said chamber ha outlet to permit the from saidchamber. y

Y 6. A powetransmitting :.iovice comorirs-A ingtwo rotary sectionscollectively forming dcvieecom ris Ncations coi ect air che aber,section to limit f ie othersection a restricted ,tual escaliie i of "airs contractible e.ii-chaniber,' saidsectiiins air vent or having heads orab'litrnonts which compress the air in said chamber and tively engagethe section 7, A power- Q ,evice compris leotiveiy ferne er, one sectionpendent rotary Lid-sections a clutch 'moet to post4 clutch membermovrble into and out-of en` 'gagement withV the mst-mentioned clutchymember.

8 A power-transmitting (l0-vice comprising two rotary sectionscollectively forming a contraotble nir-olmmoer, seid sections llavingaircompressing heads or v:3.lol1t1ru--nts forming opposed ends of thezLr-eizrmber, and means for yieldingly holding said seetions inposition4 to extend the nir chamber.

9. A poWer-trausmittng devicecomprising, first, a section hevig; :L hub,t rim ooncentrio with the hub, :i wel?, projecting inwardly from therim, and :1y lin-rubor abut ment extending crosewise of the rim;seoondly7 another section having. e, hully .zr web projecting outwardlytherefrom), :in annuler flange projecting from one sido of the web, :t

heed or abutment extending crosswise of the annular flange, and a,olutchmember projecting from the opposite sicleof the web,

said rim, webs,l annular Harige, and `abutments forming a'segmenseompressible airohamber of which the .abutments are the ends, a springconnecting the two sections und yieldingly holding `them io. position toextend the air-chamber; thirdly, a, shaft on which the hubs of saidsetons are mounted; and fourthly, a clutch member mountedA on the shaftand movable' intoiand out of engagement with the rst mentioned clutchmember. l

' JAMES C. GARRETT. fitnosseez l HENRY RAU, JAMES F. RUSSELL.

